½ cup butter
Beurre Blanc
¼ cup dry white wine 2 tablespoon finely chopped shallot 1 tablespoon white wine vinegar 2 tablespoon heavy cream ¾ cup cold unsalted butter (1 1/2 sticks), cut into 2-Tbsp. pieces Salt and white pepper
Lemony Beurre Blanc
Prepare as directed, except substitute lemon juice for the vinegar. If desired, garnish with lemon zest.
Creamy Mustard Sauce
Prepare as directed, except whisk in 2 tsp. Dijon-style mustard before serving.